CVE-2010-3879

libfuse < 2.8.5 - Unauthenticated Arbitrary Filesystem Unmount via Symlink Attack

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2010-3879. PoCs published by halfdog.

AI-analyzed exploit summary The exploit demonstrates a race-condition vulnerability in the FUSE fusermount tool, allowing a local attacker to unmount any filesystem, leading to a denial of service. It includes a minimal FUSE filesystem implementation and a directory modification tool to trigger the race condition.

Description

FUSE, possibly 2.8.5 and earlier, allows local users to create mtab entries with arbitrary pathnames, and consequently unmount any filesystem, via a symlink attack on the parent directory of the mountpoint of a FUSE filesystem, a different vulnerability than CVE-2010-0789.

Exploits (1)

exploitdb WORKING POC VERIFIED
by halfdog · textdoslinux
https://www.exploit-db.com/exploits/34953

The exploit demonstrates a race-condition vulnerability in the FUSE fusermount tool, allowing a local attacker to unmount any filesystem, leading to a denial of service. It includes a minimal FUSE filesystem implementation and a directory modification tool to trigger the race condition.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Moderate
Reliability
Racy
Target: FUSE fusermount tool
No auth needed
Prerequisites: Local access to the system · Ability to compile and run C code
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (20)

Core 20
Core References
Exploit, Issue Tracking x_refsource_confirm
https://bugzilla.novell.com/show_bug.cgi?id=651598
Exploit, Patch, Third Party Advisory x_refsource_misc
http://www.halfdog.net/Security/FuseTimerace/
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-1045-1
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/42965
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/62986
Exploit, Third Party Advisory mailing-list x_refsource_fulldisc
http://lists.grok.org.uk/pipermail/full-disclosure/2010-November/077247.html
Exploit, Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://openwall.com/lists/oss-security/2010/11/04/8
Permissions Required vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0302
Permissions Required vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0181
Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
Exploit, Issue Tracking, Patch x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=651183
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/42961
Exploit, Third Party Advisory x_refsource_confirm
https://bugs.launchpad.net/bugs/670622
Exploit, Patch, Third Party Advisory x_refsource_confirm
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=602333
Exploit, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/44623
Exploit, Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://openwall.com/lists/oss-security/2010/11/05/2
Third Party Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-1045-2
Third Party Advisory vendor-advisory x_refsource_fedora
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053792.html
Broken Link vdb-entry x_refsource_osvdb
http://osvdb.org/70520
Third Party Advisory vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2013:155

Scores

EPSS 0.0985
EPSS Percentile 94.9%

Details

CWE
CWE-59
Status published
Products (1)
libfuse_project/libfuse < 2.8.5
Published Jan 22, 2011
Tracked Since Feb 18, 2026